That was my initial thought. He was laughing out loud at the jokes but imagine the missus then mentioned he is taking the c*nt out your wife for being bald and was then forced into doing something.
I could just about understand the reaction if she was terminal or something but alopecia? It in itself is hardly life threatening though can imagine there would be aspects of mental wellbeing as a result of hair loss, especially in females. Still think it was staged to a degree the slap nonsense.